Results of a microanalysis of the psychotherapeutic conversation in change and stuck episodes are presented. For the comparison of the verbal communication, the Therapeutic Activity Coding System was applied to a sample of 33 change episodes and 34 stuck episodes, corresponding to 15 therapeutic processes. This system includes five levels of analysis: Basic Forms, Communicative Intentions, Techniques, Domain and Reference. Results show differences in change and stuck episodes. The former are characterized by an assertive speech on the therapists' side, and a more receptive language from the patients, with both actors involved in an active construction of new meanings, and the patients referring to him or herself. In contrast, the language in stuck episodes is less flexible, the use of some therapist techniques is exacerbated and the therapeutic dialogue tends to be less focused on the patient as a reference point.